New Nuclear Reactor Quality Assurance Method Tested in Russia
Sputnik/ Pavel LisitsynTech17:58 14.12.2017(updated 18:04 14.12.2017) Get short URL
A new electroanalytical non-destructive testing technique has shown promise effectively diagnosing potential problems in nuclear reactors in a simulated environment. The so-called scanning contact potentiometry method was developed in a lab at Moscow’s top nuclear research university.
The new non-destructive testing (NDT) method of quality assurance of nuclear reactors, which makes it possible to identify potential weaknesses in the concrete structures of these devices, was designed at the National Research Nuclear University (MEPhI) in Moscow and has now ben successfully tested on the IBR-2 pulse reactor at the Joint Institute for Nuclear Research in Dubna, a small city near Moscow, MEPhI told RIA Novosti.
The new electroanalytical NDT method – the so-called scanning contact potentiometry – was developed at MEPhI’s ElphysLAB. This method provides for effective diagnostics of nuclear reactors in conditions close to real working conditions of nuclear material.
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MEPhI notes that one of the main advantages of the scanning contact potentiometry method is that the sensors of its measuring system are very small (about 1-2 mm), so they can be placed almost anywhere, including places that are difficult to access, such as butt-welded joints. In addition, with the new technology, it is possible to receive information about cracks as they are beginning to form, as well as other weaknesses in the construction materials the reactor is made of.
“Using the scanning contact potentiometry method, we can find forming fatigue cracks in the reactor’s steel and also predict where they are going to appear. For example, during the test, we found a 100-micrometer-long fatigue crack forming at a depth of 2 mm three hours before the test sample was destroyed,” noted Abu Gazal Ayman Ahed, a postgraduate student at the MEPhI Design of Device and Installations Department, who tested the method in Dubna.
According to Associate Professor Vitaly Surin, head of ElphysLAB, nuclear energy companies are already interested in the scanning contact potentiometry method. It has been successfully tested at the Rostov Nuclear Power Plant. Now the institute is preparing to apply for an international patent, MEPhI’s press service notes.